Fix naming and formatting inconsistencies

Author: srutzky

docs/t-sql/language-elements/assignment-operator-transact-sql.md

@@ -47,6 +47,7 @@ GO
 
 ## See Also  
  [Operators (Transact-SQL)](../../t-sql/language-elements/operators-transact-sql.md)   
+ [Compound Operators (Transact-SQL)](../../t-sql/language-elements/compound-operators-transact-sql.md)   
  [Expressions (Transact-SQL)](../../t-sql/language-elements/expressions-transact-sql.md)